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Wear the Arc'teryx Women's Phase SL Bra and avoid that icky, uncomfortable soggy-bra feeling when you work up a sweat during your hike, climb, or mountain bike ride. Made with quick-drying, breathable, and moisture-wicking Phasic SL fabric, the Phase ensures solid on-the-trail comfort throughout your high-mountain pursuits.

  • Phasic SL features multidimensional polyester yarns that wick moisture laterally to dry quickly and polypropylene yarns with silver-ion encapsulated into the fibers that provide long-lasting odor control
  • Lightweight fabric has a smooth outer face that enables the Phase SL to slide easily under other layers
  • Flatlock seams eliminate annoying chafing issues
  • UPF 25-rated fabric shields your skin against the sun's harmful UV rays

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Here's what others have to say...


No support

  • Fit:True to size
  • Height: 5'5"
    Weight: 135 lbs

This is purely a layer with no support at all. Returned.


Plastic fabric

    My skin is very sensitive and it wasn't the best choice for me. Doesn't feel comfortable in it. Feels like wear a plastic bag.



    • Familiarity:I gave it as a gift but have feedback to share
    • Fit:True to size
    • Height: 0'0"
      Weight: 0 lbs

    Wife is prego and wanted a comfy bra. bought this in a few sizes so she could wear them as they um..changed. She's stoked on them . Low profile. Comfy


    Great Support but thin

    • Familiarity:I've put it through the wringer
    • Fit:True to size

    So I love this bra great for wearing under a tank top but not as a stand alonne. If you are looking for a good stand alone bra get the Patagonia Active Mesh Bra ( As far as support this bra is great. Also the thin-ness is there to help with breathing. So you don't have a sopping wet bra if you sweat a lot. It also is a great choice for those racer back tanks that you just don't have a bra for. I am a 34 B and the small fits great!


    Very thin fabric

    • Familiarity:I returned this product before using it

    This bra was super comfortable when I tried it on. I got a size S and wear a size 32 B bra and felt like the small fit great. I got it for climbing and wanted to be able to have the option to wear it with nothing over it around people. I felt like the fabric was way to thin, almost as thin as underwear, so I wouldn't be comfortable around people in it because it showed everything. I feel like it would be the perfect bra for running or biking if you are smaller like me because it would keep you cool and wouldn't ever bother you.


    Not for running

    • Familiarity:I returned this product before using it

    While I liked the feel of the fabric, being a 32D/34C I didn't feel this would have enough support for anything more than hiking and hanging out. I returned it for something that could provide support when I'm on the move.